Wireless Terminal Continuation Information for Satellite Handover
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Solution Overview
Problem
In non-terrestrial networks, satellite base stations move rapidly, causing frequent cell handovers for stationary ground-based wireless communication terminals. This frequent handover disrupts the synthesis of repeated data signals, often resulting in suboptimal reception quality.
Innovation Solution
A communication device and base station system that utilize continuation information to manage repetition transmission before and after handover. The system ensures seamless data synthesis by providing the terminal device with continuation information, allowing it to continue transmitting the same data after handover, which the base station can then synthesize.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If satellite base stations move rapidly to provide wide area coverage, then coverage area is improved, but handover frequency increases causing reception quality to deteriorate
Solution Approach 1:
The patent implements continuous data synthesis across handover boundaries by maintaining the same synthesis process before and after handover. The terminal device continues transmitting repeated data without interruption, and the base station seamlessly continues synthesizing the data across different cells, ensuring uninterrupted useful action despite handover events.
Solution Approach 2:
The patent applies preliminary action by pre-configuring the terminal device with synthesis configuration information before handover occurs. This includes pre-notifying the terminal of the number of repetitions and synthesis parameters that will be used after handover, allowing the terminal to prepare continuous transmission without interruption.
2Device complexity
If data synthesis is performed individually for each base station, then device complexity is reduced, but reception quality deteriorates during frequent handovers
Solution Approach 1:
The patent implements universality by using the same data synthesis processing method for both intra-cell repeated transmissions and inter-cell repeated transmissions across handovers. The base station applies identical synthesis operations regardless of whether the received repeated data comes from the same cell or a different cell, simplifying the system while maintaining effectiveness.
3Reliability
If repetition transmission is used to compensate for propagation loss, then reception quality is improved, but transmission time increases due to frequent handovers
Solution Approach 1:
The patent ensures continuous data synthesis across handover events, allowing the base station to accumulate and synthesize repeated data without interruption. This continuity prevents time loss that would otherwise occur from restarting synthesis procedures after each handover, maintaining efficient use of transmission time.
Data Source
AI summary
In a wireless communication terminal that performs repetition transmission in which predetermined data is repeatedly transmitted, a wireless communication unit receives continuation information which is information on continuation of the repetition transmission before and after handover, and a control unit performs the repetition transmission after the handover based on the continuation information.